<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <!-- 数据 -->
      <!-- 为 ECharts 准备一个定义了宽高的 DOM -->
      <div id="main" style="width: 1100px;height:600px;"></div>
    </el-card>
  </div>
</template>

<script>
// 导入echarts
import * as echarts from 'echarts'

export default {
  data() {
    return {}
  },
  async mounted() {
    // 此时页面上的dom被渲染完毕
    // 基于准备好的dom，初始化echarts实例
    var myChart = echarts.init(document.getElementById('main'))
    // 向服务器发请求
    const { data: res } = await this.$http.get('reports/type/1')
    console.log(res)
    if (res.meta.status !== 200) return this.$message.error('获取图表数据失败')
    // 指定图表的配置项和数据
    var option = {
      title: {
        text: 'Stacked Area Chart'
      },
      tooltip: {
        trigger: 'axis',
        axisPointer: {
          type: 'cross',
          label: {
            backgroundColor: '#6a7985'
          }
        }
      },
      legend: {
        data: ['Email', 'Union Ads', 'Video Ads', 'Direct', 'Search Engine']
      },
      toolbox: {
        feature: {
          saveAsImage: {}
        }
      },
      grid: {
        left: '3%',
        right: '4%',
        bottom: '3%',
        containLabel: true
      },
      xAxis: [
        {
          type: 'category',
          boundaryGap: false,
          data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
        }
      ],
      yAxis: [
        {
          type: 'value'
        }
      ],
      series: []
    }
    option.title = res.data.title
    option.legend = res.data.legend
    option.series = res.data.series
    option.xAxis[0].data = res.data.xAxis[0].data
    // 使用刚指定的配置项和数据显示图表。
    myChart.setOption(option)
  }
}
</script>

<style lang="less" scoped></style>
